package com.example.weather.db;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;

import com.example.weather.model.City;
import com.example.weather.model.County;
import com.example.weather.model.Province;

import java.sql.SQLData;
import java.util.ArrayList;
import java.util.List;

/**
 * Created by Administrator on 2017/5/27 0027.
 */

public class CoolWeatherDB {

    //数据库名称
    public static final String DB_Name = "cool_weather";

    //数据库版本
    public static final int VERSION = 1;

    private static CoolWeatherDB coolWeatherDB;

    private SQLiteDatabase db;


    //获取CoolWeatherDB
    public CoolWeatherDB(Context context){
        CoolWeatherOpenHelper dbHealper = new CoolWeatherOpenHelper(context,
                DB_Name,null,VERSION);
        db=dbHealper.getWritableDatabase();
    }

    //将Province实例化存储到数据库
    public void saveProvince(Province province){
        if (province != null){
            ContentValues values = new ContentValues();
            values.put("province_name",province.getProvinceName());
            values.put("province_code",province.getProvinceCode());
            db.insert("Province",null,values);
        }
    }

    //从数据库读取全国的省份信息。
    public List<Province> loadProvinces(){
        List<Province> list = new ArrayList<Province>();
        Cursor cursor = db.query("Province",
                null,null,null,null,null,null,null);
        if (cursor.moveToFirst()){
            do {
                Province province = new Province();
                province.setId(cursor.getInt(cursor.getColumnIndex("id")));
                province.setProvinceName(cursor.getString(cursor.getColumnIndex("province_name")));;
                province.setProvinceCode(cursor.getString(cursor.getColumnIndex("province_code")));
                list.add(province);
            }while (cursor.moveToNext());
        }
        return list;
    }

    //实例化city
    public void saveCity(City city){
        if (city != null){
            ContentValues values = new ContentValues();
            values.put("city_name",city.getCityName());
            values.put("city_code",city.getCityCode());
            values.put("province_id",city.getProvinceId());
            db.insert("City",null,values);
        }
    }

    //从数据库读取某省下所有的城市信息
    public List<City> loadCities(int provinceId){
        List<City> list = new ArrayList<>();
        Cursor cursor = db.query("City",null,"province_id = ?",
                new String[] {String.valueOf(provinceId)},null,null,null);
        if (cursor.moveToFirst()){
            do {
                City city = new City();
                city.setId(cursor.getInt(cursor.getColumnIndex("id")));
                city.setCityName(cursor.getString(cursor
                .getColumnIndex("city_name")));
                city.setCityCode(cursor.getString(cursor
                .getColumnIndex("city_code")));
                city.setProvinceId(provinceId);
            }while (cursor.moveToNext());
        }
        return list;
    }

    //实例存储COunty到数据库
    public void saveCounty(County county){
        if (county != null){
            ContentValues values = new ContentValues();
            values.put("county_name",county.getCountyName());
            values.put("county_code",county.getCountyCode());
            values.put("city_id",county.getCityId());
        }
    }

    //从数据库读取某个城市下所有的县信息。
    public List<County> loadCounties(int cityId){
        List<County> list = new ArrayList<County>();
        Cursor cursor = db.query("County", null, "city_id = ?",
                new String[] {String.valueOf(cityId)},null,null,null);
        if (cursor.moveToFirst()){
            do{
                County county = new County();
                county.setId(cursor.getInt(cursor.getColumnIndex("id")));
                county.setCountyName(cursor.getString(cursor
                .getColumnIndex("county_name")));
                county.setCountyCode(cursor.getString(cursor
                .getColumnIndex("county_code")));
                county.setCityId(cityId);
                list.add(county);
            }while (cursor.moveToNext());
        }
        return list;
    }


}
